Looking for drain-/source-swapped P-channel FET
Looking for drain-/source-swapped P-channel FET
(OP)
Looking for a P-channel FET in a SOT-23 package that has the drain and source pins swapped from the industry standard. Does not need to handle much power or voltage (5V @ 1mA).
I know such a creature exists, but finding one when you need it is (so far) impossible...
I know such a creature exists, but finding one when you need it is (so far) impossible...
Dan - Owner
http://www.Hi-TecDesigns.com





RE: Looking for drain-/source-swapped P-channel FET
My Google-fu has failed to find anything.
Worst comes to worse, there are those companies that make the tiny PCB-based chip adapters. They typically offer custom items as may be required. You'd install a "normal" industry standard FET on the adapter, and the adapter would fit straight onto the reversed pin arrangement on the main PCB. Nobody misses lunch.
I've seen their products (on the 'net) that performed much more difficult miracles than just swapping two pins on a SOT-23, so I'm fairly sure this would be trivial for them.
Good luck.
RE: Looking for drain-/source-swapped P-channel FET
JFET or MOSFET?
low voltage, so no funky drain diffusion?
Retrofit or existing part?
Body tied to source?
TTFN (ta ta for now)
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RE: Looking for drain-/source-swapped P-channel FET
RE: Looking for drain-/source-swapped P-channel FET
For a JFET, just operate it in reverse, they're not picky.
RE: Looking for drain-/source-swapped P-channel FET
Keith Cress
kcress - http://www.flaminsystems.com
RE: Looking for drain-/source-swapped P-channel FET
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Looking for drain-/source-swapped P-channel FET
Z
RE: Looking for drain-/source-swapped P-channel FET
Many moons ago I worked in an area where the electronics were treated roughly in the field <shock, awe, dismay>. Wall warts were commonly lost, leading to last-minute trips to Radio Shack to purchase replacements. Since polarity couldn't be guaranteed on the barrel jacks, I used four FETS in a bridge-like configuration that straightened out the polarity, regardless of what was used. Two FETS operated as normal, two had their body diodes used... which set did which job depended upon the polarity of the barrel jack. Worked a treat and saved many a frustrated field tech's sanity (and mine when stuff came back with the magic smoke let out).
Dan - Owner
http://www.Hi-TecDesigns.com